Solve the equation 2y + 5x = 4 for y

pls help

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

And employees salary increase by $4500 which represents a 15% raise what is the employees new salary

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares